I think that of all people who could be automated away, musk is probably not one of them. He probably would be happy to get rid of BS jobs. The problem is that once an AI gets to the tipping point of being able to improve itself, it will a) get super-intelligent, and b) start optimizing everything for it's programmed purpose. There was a great discussion with Nick an the Partially Examined Life podcast. The point of the investment is that we don't know what will happen when AI hits that point, or when it will be. So it makes sense to think about it..